map = new GMap(document.getElementById("map"));
map.addControl(new GMapTypeControl());
map.addControl(new GLargeMapControl());


GEvent.addListener(map, "moveend", 
 function() {
  var zoom= map.getZoomLevel();
  var bounds = map.getBoundsLatLng();
   
  startRequest(bounds.minX, bounds.minY, bounds.maxX, bounds.maxY, zoom, 1);
    
  lastzoom=zoom;
});

map.centerAndZoom(new GPoint(centerx,centery), zoom);